All 7 AWS Serverless Application Model (SAM) questions
More in AWS Serverless Application Model (SAM)
What is the SAM CLI, and how does it support local testing of serverless applications before deployment? How does the sam build and sam deploy workflow package and deploy a serverless application to AWS? How does SAM support defining event sources, such as API Gateway or S3 triggers, directly within a function's configuration? How does SAM support safe, gradual Lambda deployments using traffic shifting and automatic rollback? How does SAM support nested applications and reusable components through the AWS Serverless Application Repository? How can SAM templates be organized and parameterized to support deploying the same serverless application consistently across multiple environments like development, staging, and production?
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What is AWS SAM and how does it simplify building and deploying serverless applications?

Beginner

Answer

AWS SAM, or Serverless Application Model, is an open source framework that provides a simplified shorthand syntax for defining serverless resources like Lambda functions, API Gateway endpoints, and DynamoDB tables, which SAM then automatically transforms into a full CloudFormation template during deployment, letting you define a complete serverless application with significantly less code than writing raw CloudFormation directly.
AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Resources:
  MyFunction:
    Type: AWS::Serverless::Function
    Properties:
      Handler: app.handler
      Runtime: python3.12
Real-world example A developer building a serverless API defines their Lambda function, API Gateway endpoint, and DynamoDB table using SAM's concise syntax, requiring far fewer lines of configuration than would be needed to define the same resources directly in raw CloudFormation.

Common follow-ups: How does SAM relate to and differ from raw CloudFormation?;What is the AWS::Serverless-2016-10-31 transform doing behind the scenes?

IaC (CloudFormation);Lambda & Serverless
All 7 AWS Serverless Application Model (SAM) questions